DC Motors In D.C. machines the residual magnetism is of the order of 2 to 3 percent 10 to 15 percent 50 to 75 percent 20 to 25 percent 2 to 3 percent 10 to 15 percent 50 to 75 percent 20 to 25 percent ANSWER DOWNLOAD EXAMIANS APP
DC Motors For a D.C. shunt motor if the excitation is changed Torque, power and speed, all will change Torque and power both will change Torque will remain constant Torque will change but power will remain constant Torque, power and speed, all will change Torque and power both will change Torque will remain constant Torque will change but power will remain constant ANSWER DOWNLOAD EXAMIANS APP
DC Motors The speed of a series motor at no load is 1000 rpm Infinity 2000 rpm 4000 rpm 1000 rpm Infinity 2000 rpm 4000 rpm ANSWER DOWNLOAD EXAMIANS APP
DC Motors A three point starter is considered suitable for All D.C. motors Shunt, compound and series motors Shunt as well as compound motors Shunt motors All D.C. motors Shunt, compound and series motors Shunt as well as compound motors Shunt motors ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not the function of pole shoes in a D.C. machine? To reduce eddy current loss To support the field coils To reduce the reluctance of the magnetic path To spread out flux for better uniformity To reduce eddy current loss To support the field coils To reduce the reluctance of the magnetic path To spread out flux for better uniformity ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to 100% of the previous value 50% of the previous value 25% of the previous value 10% of the previous value 100% of the previous value 50% of the previous value 25% of the previous value 10% of the previous value ANSWER DOWNLOAD EXAMIANS APP
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